Lease termination (Notes)	9 Months Ended
Sep. 30, 2018
Lease termination [Abstract]
Lease termination	Note 13 — Lease Termination In the first quarter of 2012, the Company signed a 10 year agreement to lease space for a new corporate headquarters in Chicago, Illinois ("Lease"). In the fourth quarter of 2013, due to excess capacity as a result of a corporate restructuring, the Company agreed to sublease a portion (approximately 17,100 square feet) of its corporate headquarters to a third party ("Sublease"). Both the Lease and the Sublease were scheduled to terminate in the first quarter of 2023. In the second quarter of 2018, the Company entered into agreements with the lessor and the sub lessee to terminate both the Lease and Sublease in June 2019. The original loss recorded on the Sublease was reduced by $0.7 million in the second quarter of 2018 to reflect the shortened lease time frame. Additionally, the Company is required to pay a $0.5 million fee before June 2019 as a condition of early termination of the original Lease. As a result of these transactions, a $0.2 million net gain was recognized in the second quarter of 2018. The $0.5 million early termination fee is included in current liabilities in the condensed consolidated balance sheet. The termination of the Lease will reduce the Company’s future operating lease obligation by $1.2 million, offset by a reduction in future payments from the Sublease of $0.4 million.

Note 13 — Lease Termination

In the first quarter of 2012, the Company signed a 10 year agreement to lease space for a new corporate headquarters in Chicago, Illinois ("Lease"). In the fourth quarter of 2013, due to excess capacity as a result of a corporate restructuring, the Company agreed to sublease a portion (approximately 17,100 square feet) of its corporate headquarters to a third party ("Sublease"). Both the Lease and the Sublease were scheduled to terminate in the first quarter of 2023.

In the second quarter of 2018, the Company entered into agreements with the lessor and the sub lessee to terminate both the Lease and Sublease in June 2019. The original loss recorded on the Sublease was reduced by $0.7 million in the second quarter of 2018 to reflect the shortened lease time frame. Additionally, the Company is required to pay a $0.5 million fee before June 2019 as a condition of early termination of the original Lease. As a result of these transactions, a $0.2 million net gain was recognized in the second quarter of 2018. The $0.5 million early termination fee is included in current liabilities in the condensed consolidated balance sheet.

The termination of the Lease will reduce the Company’s future operating lease obligation by $1.2 million, offset by a reduction in future payments from the Sublease of $0.4 million.